Dwyer TDS2-10 - Manual (Page 2)

LCD Display
- The top shows the measured reading.
- The bottom shows the reading of the temperature.
- Cal = Calibration mode.
- Hold = Data hold.
- Microseconds (uS) or milliseconds (mS) is the unit of Conductivity.
- Parts per thousand (ppt) or parts per million (ppm) is the unit of TDS.
- C or F is the unit of the liquid temperature.
- is the battery low icon.
Keypad
Operation
1. Remove the probe cover from the meter to expose the electrode.
2. Press to power on the meter. The LCD will display parameters (ex: tnr, tCo, tds,
rAn) in turns and then it will enter normal display.
3. The meter is default in auto-ranging status once powered on. Auto-ranging
determines and selects a range which gives you the greatest resolution and
accuracy. Alternatively, you can manually select the ranges. For example, if
you prefer the meter to display a reading such as .50 mS instead of 500 uS, you
press for more than 2 seconds.
4. Set the temperature coefficient to the correct value. The meter is factory set to
2.1%/°C. This will normally provide good results. See the setup section to set the
temperature coefficient if needed.
5. Select the normalization temperature. The meter is factory set to 77°F (25°C). If you
need to normalize the meter to 68°F (20°C), see the set up section for details.
6. Rinse the probe with de-ionized or distilled water before use. This will remove any
impurities adhering to the electrode. If the meter is not used for a long time, please
soak the probe for more than 30 minutes to clear up the lazy effect of the probe.
7. Dip the probe into the sample. Make sure there are no air bubbles trapped in the
slot of the probe. To remove air bubbles, give the probe a gentle stir. Make sure the
electrode tip is submerged when you stir it.
8. Stir the probe gently in the sample to create a homogeneous sample. Allow a few
seconds for it to reach temperature equilibrium (wait about 15 minutes to get a
stable reading).
9. The unit of measurement will flash on the LCD to indicate that the meter is in
measurement mode. When the reading is stable, the unit will stop flashing.
10. Press to freeze current readings. The text “Hold” will appear on the LCD. Press
again to release.
11. Turn off the meter by pressing .
12. Make sure your electrode is clean and store it carefully. Before storage, rinse it
carefully in de-ionized water and store dry with the cap. Remember the storage
temperature limits. For more information, see the maintenance section.
13. Air bubbles can easily adhere around the gap between the electrode and the
meter; this will affect the accuracy. See the troubleshooting section for more
details on how to remove air bubbles.
Auto Power off (Sleep Function)
This meter will shut off automatically after 20 minutes of inactivity. For a longer
operating time, you can disable sleep mode.
To disable the auto power off:
Before power on, press + simultaneously until an “n” appears on the screen.
Then, release the keys to return to normal mode.
Setup
The advanced setup mode lets you customize your meter’s preferences and defaults.
To change the parameters, you can press for more than 2 seconds. You will enter
setup mode when the meter is in measurement mode.
The disable sleep mode will be invalid after every power off. NOTICE
- Accuracy is a percent of the full-scale, so using your meter in
the lowest range will result in the greatest accuracy.
- The LCD will display E02/E03 if the measured value is below or over the limit
value, please re-select the range.
NOTICE